[PATCH v1 2/4] dt-bindings: pinctrl: mt8192: Add mediatek, drive-strength-adv property

[Nícolas F. R. A. Prado]

Add the mediatek,drive-strength-adv property to the pinctrl-mt8192
dt-binding to allow further drive current adjustments for I2C nodes on
MT8192. It is the same as in mt8183-pinctrl.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
---

 .../bindings/pinctrl/pinctrl-mt8192.yaml      | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml
index d63e23d9ed16..b52d8d0eb2d0 100644
--- a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml
@@ -78,6 +78,32 @@ patternProperties:
               dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192.
             enum: [2, 4, 6, 8, 10, 12, 14, 16]
 
+          mediatek,drive-strength-adv:
+            description: |
+              Describe the specific driving setup property.
+              For I2C pins, the existing generic driving setup can only support
+              2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they
+              can support 0.125/0.25/0.5/1mA adjustment. If we enable specific
+              driving setup, the existing generic setup will be disabled.
+              The specific driving setup is controlled by E1E0EN.
+              When E1=0/E0=0, the strength is 0.125mA.
+              When E1=0/E0=1, the strength is 0.25mA.
+              When E1=1/E0=0, the strength is 0.5mA.
+              When E1=1/E0=1, the strength is 1mA.
+              EN is used to enable or disable the specific driving setup.
+              Valid arguments are described as below:
+              0: (E1, E0, EN) = (0, 0, 0)
+              1: (E1, E0, EN) = (0, 0, 1)
+              2: (E1, E0, EN) = (0, 1, 0)
+              3: (E1, E0, EN) = (0, 1, 1)
+              4: (E1, E0, EN) = (1, 0, 0)
+              5: (E1, E0, EN) = (1, 0, 1)
+              6: (E1, E0, EN) = (1, 1, 0)
+              7: (E1, E0, EN) = (1, 1, 1)
+              So the valid arguments are from 0 to 7.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1, 2, 3, 4, 5, 6, 7]
+
           bias-pull-down: true
 
           bias-pull-up: true
-- 
2.35.1